Woven wire screen



ApriE 14-, 136. c, A, SCHEELE'R 2%- WOVEN WIRE SCREEN Filed Nov. 16, 1935 M Y T ATTORNEY 4% '1 Patented Apr. 14, 1936 UNITED STATES WOVEN WIRE SCREEN Charles A. Scheeler, Buffalo, N. Y., assignor to Buffalo Wire Works (30., Inc., Buffalo, N. Y., a

corporation of New. York Application November 16, 1935, Serial-No. 50,207

8 Claims.

This invention relates to a woven wire screen and more particularly to a grain cleaning screen in which the shoot or weft wires are closely spaced and in which the warp wires are arranged in 5 groups or strands, each composed of a plurality of contiguous warp wires to provide the necessary strength and the strands being spaced a substantial distance from one another so as to provide a screen having elongated openings in the direction of the shoot or weft wires. Such screens are generally, but not necessarily, also provided with hardened sprin steel shoot wires, while the Warp wires are of soft steel.

Serious difiiculty has been encountered in weaving screening of this type, the principal diffioulty being in the breaking of the warp wires during weaving. A further difficulty encountered was the tendency of the side warp wires of each strand to separate and slide outwards along the shoot wires. Heretofore such screening has been made in which'the warp strands were composed of a single central warp wire flanked by an equal sized warp wire on each side and woven in opposition to the central wire. With this screen great difficulty was experienced during the weaving operation, the central warp wire of each strand breaking at frequent intervals. This was due to the fact that the combined force or pressure of the two flanking wires was exerted against this central warp wire, crimping it more sharply and putting it under excessive strain. In other words, each shoot wire would be offset toward the side embraced by the single central wire and this wire was under excessive strain. When a heavier central wire was used to compensate for this strain, the shoot wires distorted or crimped and the flanking wires slid outwardly along the shoot wires thereby resulting in separation of the wires of the strand. Since the screen mesh is elongated 40 in the direction of the shoot wires, this separating tendency was very pronounced as compared with square mesh screening. This same result would occur if four Warp wires were employed in the strand in alternation, i. e. the first and third wires and the second and fourth wires parallel with one another. Moreover, with this last form, the outside wires would not only spread but would do no work.

It is the object of thepresent invention to provide a screen having elongated mesh in the direction of the shoot wires, and having the warp wires arranged in. strands composed of a plurality of wires, in which the warp wires are so woven that the strain is distributed equally among the several warp wires in each strand and in which there is no tendency for the flanking warp wires of each strand to slide out because of the great distance between the strands.

In the accompanying drawing:

Fig. 1 is a plan view of, a small section of a grain cleaning screen made in accordance with my invention.

Fig. 2 is a section, taken in the direction of the shoot wires along line 22, Fig. 1.

Figs. 3 and 4 are sections taken parallel with the warp wires along the correspondingly numbered lines on Fig. 1.

The grain cleaning screen shown consists of a plurality of shoot or weft wires l interwoven with strands l l of warp wires by inserting the shoot wires in the shed formed by the loom in the usual and well known manner. The shoot wires ID are preferably made of hardened spring steel in grain cleaning screening but my invention can be practiced with other types of shoot wires. The strands ll of warp wires are spaced a very substantial distance apart and the shoot wires II! are closely spaced so that the openings 12 in the screen are elongated in the direction of the shoot wires.

Each strand ll of warp wires consists of four separate wires arranged side by side, the central pair of warp wires I 3 and 14 being flanked by side warp wires l and I6. The warp wires of each strand are identical in size and other characteristics. Each warp wire passes from one side of each shoot wire to the opposite side of the next succeeding shoot wire, in the usual and well known manner, and the central pair of warp wires l3 and 14 of each strand are woven parallel with one another. The outside warp wires l5 and 16 are woven to pass on the opposite side of each shoot wire from that embraced by the central pair of wires [3 and I4 and therefore the outside wires and I6 are disposed parallel with one another.

It will also be noted that the corresponding warp wires of successive strands aregwoven oppositely to one another. Thus with the top strand in Fig. 1, the outside warp wiresweave over the first. shoot wire In on the left, whereas the outside warp wires of the next strand I l weave under this left shootwire. This reduces the tendency of the warp wires to deflect the'long stretches of the shoot wires between the strands I I.

The warp wires composing the strands H are all of the same size and it has been found that by weaving four wire warp strands in the manner shown there is no danger of breaking any of the warp wires during weaving, nor is there am tendency for the side wires of the strands to slide out from the strand even with the elongated mesh shown.

With screening heretofore made with three wire strands and the outside wires alternating with the central wire, the combined force of the two outside wires against the central wire caused the central wire to break frequently during weaving. On substituting a larger central wire in the three wire strands, the outside wires would slide out due to the long distance between the strands. Other arrangements of the wires of a four wire strand were also found wanting since if the strand were composed of two pairs of parallel wires arranged side by side, the pairs would slide away from one another and if the four wires were woven in alternation with one another (the first and third and the second .and fourth wires parallel with one another) the outside wires would 'not only slide out, but also would do no work.

The four wire warp strands, woven in the manner shown, overcome the above objections and provide a warp weave for screening having elongated mesh in the direction of the shoot wires whichis easily woven, is not subject to breakage in use and in which the wires comprising the warp strands do not tend to separate.

I claim as my invention:

1. A woven wire screen composed of closely spaced shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated in the direction of the shoot wires, each of said strands being composed of a pair of central wires interwoven with the shoot wires parallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires.

2. A woven wire screen composed of closely spaced hardened shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated'in the direction of the shoot wires, each of said strands being composed of a pair of central wires interwoven with the shoot wires parallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires.

3. A Woven wire screen composed of closely spaced hardened, spring steel shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated in the direc tion of the shoot wires, each of said strands being composed of a pair of central wires interwoven with the shoot wires p-arallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires.

4. A woven wirescreen composed of closely spaced shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated in the direction of the shoot wires, each of said strands being composed of a pair of central wires interwoven with the shoot wires parallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires, said warp wires all being of the same size.

5. A woven wire screen composed of closely spaced shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated in the direction of the shoot wires,

' each of said strands being composed of a pair of central wires interwoven with the shoot wires parallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires, said warp wires being identical in form and composition.

6. A woven wire screen composed of closely spaced shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than the shoot wires so as to provide screen openings which are elongated in the direction of the shoot Wires, each of said strands being composed of four wires, the central pair of which pass alternately on opposite sides of the successive shoot wires parallel with one another and each out-' side wire engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires, said warp wires being of the same cross sectional size so that the strain is distributed evenly among them and the side Wires do not tend to separate from the strand.

7. A woven wire screen composed of closely spaced shoot wires and interwoven strands of contiguous warp wires, the strands being spaced a greater distance from one another than said shoot wires so as to provide openings which are elongated in the direction of the shoot wires,

each of said' strands being composed of a pair of central wires interwoven with the shoot wires parallel with one another and a side wire on each side of said pair of central wires and engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires, the several strands being so woven that the corresponding wires of successive strands engage the opposite side of each shoot wire.

8. A woven wire screen composed of closely spaced shoot wires and interwoven strands of contiguous warp 'wires, the strands being spaced a greater distance from one another than the shoot wires so as to provide screen openings which are elongated in the direction of the shoot wires, each of said strands being composed of four wires, the central pair of which pass alternately on opposite sides of the successive shoot wires parallel with one another and each outside wire engaging the side of each shoot wire opposite from that engaged by the central pair of warp wires, said warp wiresbeing of the same cross sectional size so that the strain is distributed evenly among them and the side wires do not tend to separate from the strand, the several strands being so woven that the corresponding wires of successive strands engage the opposite side of each shoot wire.

:CI-IARLES A. SCHEELER. 

